JP7006177B2 - Multiple extrusion tube container - Google Patents

Description

The present invention is an extruded tube container for storing cosmetics, daily necessities such as mustard brushes, foods such as mustard paste, and contents having viscosity such as adhesives, and includes products having multiple colors or various kinds of viscosity. As a substance, the present invention relates to a multi-extrusion tube container that can be extruded in a multi-layered state at a time without mixing them.

Conventionally, a two-color extrusion tube container for toothpaste has been known as a container for storing contents having various viscosities of different colors and materials and extruding many kinds of contents at once without mixing at the time of use. There is.
In this method, when filling the contents, the contents having different kinds of viscosities are filled in the tube main body in parallel in the vertical direction with the cross sections divided.
The contents of such an extruded tube are stored in a state where the contents having different kinds of viscosities are in direct contact with each other. For this reason, if an external force is partially applied to the tube container body due to vibration, heat, etc. during distribution / storage, or during pouring, the viscous contents will be mixed and mixed, resulting in discoloration or discoloration. There was a problem of being extruded with a change in viscosity.

In response to the above problems, Document 1 describes a two-chamber tube container in which a second container having a small internal volume is inserted into a first container having a large internal volume.
The first container used here has a circular cross section, and the second container has a (semicircular) arcuate cross section and a small body with a small internal volume that is half the capacity of the first container. is doing.
Then, the neck (second neck) of the second container is inserted into the neck (first neck) of the first container, and the first note concentric with the first neck and the second neck. It forms an outlet and a second injection outlet.
The bottoms of both containers are integrally welded.
The second neck portion is provided with two or more fitting protrusions protruding outward in the radial direction at equal intervals at the upper end portion thereof.
Further, on the inner surface side of the first neck portion, grooves extending from the lower end to the upper end in a shape and size that allow the fitting convex portion to pass through are provided in the same number as the fitting convex portions and at equal intervals. Further, at the upper end of the first neck portion, in the middle portion of each groove portion, a fitting recess having a size and a depth capable of accommodating the fitting convex portion is provided on the inner peripheral surface side thereof. There is.
Further, the arc portion of the cross section of the body of the second container is inscribed in the arc portion of the cross section of the body of the first container.
In this two-chamber tube container, each fitting convex portion of the second neck portion is housed in each fitting recess of the first neck portion, and the upper ends of both neck portions are substantially flush with each other. There is.
Since this two-chamber tube container has the same number of grooves extending from the lower end to the upper end at the neck and at equal intervals as the fitting protrusions, the two contents are surely separated up to the spout. It is designed to prevent mixing inside the container.
However, in this container, the body is largely divided into left and right, or front and back, so the viscosities of the two contents are significantly different, and depending on how the force applied to the ejection tube is applied, the neck is in the vertical direction. The position changes inside and outside, and it becomes impossible to extrude a uniform ratio of the contents, which tends to cause a problem that one of the contents is pushed out unevenly.
Moreover, this method has a problem that the extrusion ratio can be changed only from 3: 2 to 2: 3 in principle at 1: 1.

On the other hand, in Document 2, the spout, the shoulder, and the small-diameter extruded tube composed of the body are provided inside the large-diameter extruded tube composed of the spout, the shoulder, and the body. We are proposing multiple extrusion tube containers that keep the gap between the large-diameter extrusion tube and the small-diameter extrusion tube uniform.
However, when an upper lid such as a hinge cap is inserted into the spout, the inner ring provided on the inner surface of the cap upper lid that rotates via the hinge is difficult to be inserted vertically into the spout and must be inserted vertically. , There is a problem that it is easy to leak from the fitting part.
To solve this problem, if the inner ring and the spout provided on the inner surface of the upper lid can be moved to a position as far as possible from the hinge, it becomes easy to insert the inner ring vertically to the spout. Therefore, it is desirable to move the position of the spout provided on the cap body or the position of the inner ring of the upper lid to a position away from the center.
However, even if the position of the spout or the position of the inner ring of the upper lid is shifted from the center and fitted, the large-diameter extruded tube and the small-diameter extruded tube spout cannot be accurately arranged concentrically, and the center shifts. Was occurring.

Jitsufuku No. 6-28438 Gazette Japanese Unexamined Patent Publication No. 2014-51292

In view of the above problems, there is no mixing inside the container, and regardless of how the pushing force is applied, no matter how or how the pushing force is pushed, the pushing ratio does not change, and multiple contents are pushed. The present invention is to obtain a multi-extruded tube container that can be ejected, has high sealing performance even when a hinge cap is fitted, and can uniformly extrude different kinds of contents in a concentric manner. Is the issue.

The multiple extrusion tube container of the present invention
A large diameter outer tube consisting of a spout, shoulders and torso,
A small-diameter inner tube that is housed inside the outer tube and consists of a spout with a circular tip and a shoulder and body.
In a multi-extruded tube container consisting of a sealable cap that fits into the spout of the outer tube and has a spout with a circular tip.
It has at least two or more positioning protrusions on the outside from the spout of the inner tube to the shoulder.
The inner surface of the spout of the cap comes into contact with the positioning protrusion of the inner tube,
The spout of the inner tube and the spout of the cap have a uniform gap at the periphery .
Further, the multi-extruded tube container is characterized in that it has a hooking protrusion on the inner surface of the pouring outlet of the cap to be hooked on the positioning protrusion of the inner tube to regulate the position in the pouring direction .

The multiple extrusion tube container of the present invention
The outer and inner tubes store the individual contents in separate, separate areas so that different contents do not mix with each other before pouring and they do not react or change. ..
Further, from the spout of the inner tube to the shoulder, at least two or more positioning protrusions are provided on the outside, and the inner surface of the spout of the cap abuts on the positioning protrusions to have a uniform gap at the peripheral edge. No matter which part of the tube container is pushed, the ratio of the plurality of extruded contents does not change, and the extruded contents are stably extruded. Moreover, a plurality of contents can be stably extruded at the same ratio depending on the pushing force and speed.
Since it is extruded in the form of a layer between the surface layer and the core, it is possible to make a large difference in the ratio of the amount easily extruded by changing the size of the inner tube with respect to the outer tube. ..
Furthermore, since the spout can be displaced from the center of the cap body and can be placed at an appropriate position, the upper lid and the spout are well fitted, sealed, and have high storage performance.

It is a vertical cross-sectional view of the multi-extrusion tube container of this invention, and the cross-sectional view in the vicinity of the spout of the outer tube. It is a vertical sectional view which shows each member in the vicinity of the spout of the cap, the outer tube and the inner tube used in the multi-extrusion tube container of this invention. It is a vertical sectional view which shows the example of the different fitting in the fitting of the inner tube and the cap in the multi-extrusion tube container of this invention. It is sectional drawing which shows the state which extrudes the contents from the multi-extrusion tube container of this invention in a multi-layered state. It is an example of the multiple extrusion tube container of this invention, and is the vertical sectional view which shows the double extrusion tube container which fitted the hinge cap which separated the spout from the hinge. As an example of the multiple extrusion tube container of the present invention, it is a vertical cross-sectional view showing a triple extrusion tube container and a cross-sectional view in the vicinity of the outer extrusion tube spout.

Hereinafter, an example of an embodiment of the multiple extrusion tube container of the present invention will be described in detail with reference to the drawings.
FIG. 1-1 is a vertical cross-sectional view of the multiple extrusion tube container 1 of the present invention, and FIG. 1-2 is a cross-sectional view of the outer extrusion tube 2 of the multiple extrusion tube container 1 in the vicinity of the spout 22.
The multiple extrusion tube container 1 of the embodiment shown here is composed of an outer tube 2, an inner tube 3, and a cap 4.

2 is a member used for the multiple extrusion tube container shown in FIG. 1, in which a cap is shown in FIG. 2-1, an outer tube is shown in FIG. 2-2, and an inner tube is shown in FIG. 2-3 near the spout. It is shown in the vertical sectional view in.

The outer and inner extruded tubes each have a spout with a pouring passage in the center that allows the contents to be poured, a shoulder that extends downward from the lower edge of the spout, and a thin wall that extends downward from the shoulder margin. It is made up of a flexible cylindrical body and.
These extruded tubes may be blow tube containers that are integrally molded by simultaneously molding the spout, shoulder and body by blow molding, and are formed by cutting the bottom.
Alternatively, the body is extruded into a deformed shape, or the body is formed into a tubular shape by fusing the left and right sides of a single-layer or multi-layer sheet into a mold, and the shoulder and spout are injection-molded. It may be fused to the upper end of the body while being formed by.
Further, it may be an extruded tube in which a shoulder portion and a spout, which are preformed by high-frequency heating or the like, are fused to the body portion.

The outer tube 2 is made of a large-diameter tube container, and not only the body 31 of the inner tube 3 but also the spout 32 and the shoulder 33 of the inner tube 3 are loaded into the spout 22 and the shoulder 23 of the outer tube 2. It is the size possible.
On the outside of the spout 22 of the outer tube 2, a locking ring 221 that fits into the cap 4 is provided.

The inner tube 3 is made of a tube container having a small diameter, and has at least two or more positioning protrusions 34 on the outer surface extending from the spout 32 to the shoulder portion 33. The inner tube 3 shown in FIG. 1 has four positioning protrusions 34 and is in contact with the inner surface of the spout 41 of the cap 4.
As a result, the spout 32 of the inner tube 3 forms a uniform gap concentrically with the spout 41 of the cap.
Further, the tip of the spout 32 of the inner tube 3 and the tip of the spout 41 of the cap are locked at the same height position in the pouring direction.

The cap 4 has a spout 41 so as to protrude outward (upward) from the top plate 42. Further, an inner ring 43 hanging from the inner vicinity of the lower peripheral edge of the spout 41, a contact ring 44 on the outside thereof, and a hooking protrusion 45 hanging from the top plate are provided on the outside thereof.
The inner ring 43 abuts on the inner surface of the spout 22 of the outer tube, the contact ring 44 abuts on the upper end of the spout 22, and the hooking projection 45 hooks on the locking ring 221 and on the outer surface of the spout 22. By abutting and abutting in three directions, the outer tube 2 is sealed without a gap from the spout 22.
Further, at one end of the top plate 42, the upper lid 47 can be rotated via a hinge 46.
The upper lid 47 has an inner ring 471 that can be inserted into the spout 32, a locking ring 472 that can be inserted into the spout 41 of the cap 4, and a finger when opening the upper lid 47 on the opposite side of the hinge 46. It has a flange part 473 to hang.
Further, the peripheral edge of the top plate has a peripheral edge step 421 into which the inner peripheral edge of the lower end of the lid side wall 474 hanging from the peripheral edge of the upper lid 47 can be inserted, ensuring the positioning of the inner ring 43 and the locking ring 472. ..
On the opposite side of the hinge of the cap top plate 42, a recess 422 is provided so that the top plate is chipped so that a finger can be reliably hooked on the flange portion 473 when the top lid 47 is opened.

In order to ensure that the contents to be poured out from the inner tube 3 and the contents to be poured out from the outer tube 2 are stably and evenly poured out, the following measures are further taken at the tip of the spout.
That is, the tip of the spout 32 of the inner tube 3 and the tip of the spout 41 of the cap have a cylindrical shape with a circular tip.
The tubular shape length L1 from the upper end of the positioning protrusion 34 of the spout 32 to the tip of the spout 32 is set to be a length r or more of the radius of the spout in the inner tube.
Further, the tubular shape length L2 from the upper end of the contact portion between the spout of the cap and the spout of the inner tube to the tip of the spout of the cap is also set to a length equal to or greater than the radius length r of the spout in the inner tube. ing.
As the lengths L1 and L2 of the tubular shape become larger, the contents to be poured out from the inner tube 3 and the contents to be poured out from the outer tube 2 can be stably and evenly poured out.

Further, the narrowed portion where the gap cross-sectional area between the spout 22 of the outer tube 2 and the spout 32 of the inner tube 3 is narrower than the gap cross-sectional area between the spout 41 and the spout 32 at the tip of the spout is formed from the tubular shape length. I try to hold it down.
For example, in the gap between the shoulder portion 23 and the shoulder portion 33, or in the gap between the spout 41 and the spout 32, at least one narrowed portion narrower than the gap cross-sectional area between the spout 41 and the spout 32 is formed. prepare.

FIG. 3 is a vertical sectional view showing an example of different fitting in the fitting of the inner tube and the cap in the multiple extrusion tube container of the present invention.
In FIG. 3-1 as shown in FIG. 1, the position of the spout 32 of the inner tube is restricted only by the positioning protrusion 34 of the inner tube 3 contacting the inner surface of the spout 41 of the cap, and the position of the spout 32 of the inner tube is regulated with the spout 41 of the cap. The gap between the inner tube and the spout 32 is adjusted to a certain gap.

FIG. 3-2 has a hooking protrusion 411 that hooks on the positioning protrusion 34 of the inner tube 3 on the inner surface of the spout 41 of the cap, and a hooking recess 341 that can be hooked on the hooking protrusion 341 is provided on the positioning protrusion 34 for note. This is an example of regulating the position in the outgoing direction.
By engaging the spout 41 and the positioning protrusion 34 of the inner tube 3 in this way, the heights of the spout 32 of the inner tube 3 and the spout 41 of the cap in the pouring direction can be more reliably aligned. Can be done.
When such position regulation is performed, the inner tube does not fall inward, so that the insertion strength between the spout of the cap and the inner tube and the inner ring can be surely increased. At the same time, when only a part of the outer tube 2 is pushed, there is no possibility that the spout 32 of the inner tube 3 falls inward and the contents are mixed in the vicinity of the spout.

FIG. 4 is a cross-sectional view of FIG. 4 showing a state in which the contents are extruded from the multi-extruded tube container in a multi-layered state. The contents poured out from the tip of the spout are extruded in a uniform concentric circle with the contents of the inner tube 3 in the center covered uniformly with the contents of the outer tube 2 according to the cross-sectional area of the gap. Is done.
By setting the tubular shape length L1 to a length equal to or greater than the length r of the radius of the spout in the inner tube, or by providing a constricted portion below the tubular shape length, it is proportional to the gap cross-sectional area at the tip of the spout. Then, it can be poured out more evenly.
The ratio of the cross-sectional area of the body 31 of the inner tube to the cross-sectional area of the body 21 of the outer tube and the ratio of the cross-sectional area of the tip of the spout 32 to the cross-sectional area of the tip of the spout 22 are the same. It is preferable to keep it.
This makes it easier to maintain the content extrusion ratio at the time of pouring until the end.

FIG. 5 is an example of the multiple extrusion tube container of the present invention, and is a vertical sectional view showing a double extrusion tube container in which a hinge cap with a spout separated from a hinge is fitted.
In the cap 4 in which the upper lid 47 is connected to the cap by a hinge 46, it is preferable that the locking ring 472 and the inner ring 471 to be inserted are provided as far as possible from the hinge 46 with respect to the center of the top plate 42 of the cap.
If there is a fitting part to be inserted near the hinge 46, the arc of the trajectory that rotates around the hinge 46 will have a small radius and will easily interfere, so the length of the fitting part that is easy to stop liquid is long. The exit could not be used.
Therefore, as shown in FIG. 5, if the spout is separated from the hinge, the length of the insertion portion can be lengthened and the spout length can be lengthened, so that the liquid drips more when pouring. It can be a difficult tube container.

FIG. 6 is an example of the multiple extrusion tube container of the present invention, and is a vertical cross-sectional view showing a triple extrusion tube container and a cross-sectional view in the vicinity of the outer tube spout.
A second inner tube 5 having a second positioning protrusion 54 at a different position of the positioning protrusion 34 is further inserted into the inner tube. Thus, the present invention can be made into multiple extrusion tube containers, such as triples, as well as doubles.

For the outer tube container and the inner tube container used in the multiple extrusion tube container of the present invention, a polyolefin resin having high fusion resistance in the innermost layer is preferable as the body, low density polyethylene, linear low density polyethylene, and medium. Density polyethylene, ethylene vinyl acetate copolymer, etc. can be used.
For the body of the inner tube, the above-mentioned highly fused polyolefin resin is also used for the outer layer.
Polyethylene terephthalate film, polyamide resin, ethylene-vinyl acetate copolymer satanized product, etc. can be used for the intermediate layer of the body, and further, barrier properties such as metal foil such as aluminum and metal oxide vapor deposition film such as silicon oxide can be used. The film to be held can be sandwiched.

Polyolefin-based resins with high fusing properties are preferable for the spout and shoulders, and low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, ethylene-vinyl acetate copolymer, and the like can be used. Further, a polyethylene terephthalate film, a polyamide resin, an ethylene-vinyl acetate copolymer satanized product, or the like can be used as the inner surface, the outer surface, or the intermediate layer of the shoulder portion or the spout, and further, a metal foil such as aluminum or silicon oxide can be used. A film having a barrier property such as a metal oxide vapor deposition film such as the above can also be inserted.

As a tube molding method, a blow tube container may be used in which a single-layer parison or a multi-layer parison is used and the body, spout, and shoulder are integrally molded by blow molding.
In addition, the body is manufactured by deformed extrusion molding, or both ends of a rectangular film are bonded together to form a tubular shape, and the spout and shoulder are injection-molded at one end, and the extrusion tube is fused by the heat of fusion. It can also be manufactured by a method in which a spout and a shoulder portion are formed by injection molding or compression molding and fused to the body portion while being heated at a high frequency or the like.

As the cap, polyethylene or polypropylene can be used as long as it is a hinge cap, but an ethylene / propylene copolymer is particularly preferable.
If the top lid and the cap body are separate bodies instead of the hinge cap, in addition to polyethylene, polypropylene, ethylene / propylene copolymer, etc., acrylonitrile / butadiene / styrene copolymer, acrylonitrile / styrene copolymer, polymethylpentene, etc. And so on.
The cap can be manufactured by injection molding using an ordinary injection molding die.

<Example>
The outer tube has an outer diameter of φ40 mm and a spout inner diameter of φ12 mm.
The inner tube has an outer diameter of φ22 mm, a spout outer diameter of φ5.5 mm, and a spout inner diameter of φ4.5 mm.
A double extrusion tube container having the shape shown in FIG. 1 having a length of 3 mm from the upper end of the positioning protrusion of the inner tube to the tip of the spout was prepared.
The contents were filled with the cap of FIG. 1 fitted and the cap down.
As the contents, ketchup was filled between the outer tube and the inner extruded tube, and mayonnaise was filled inside the inner tube, and the bottom was fused.

<Evaluation method>
As an injection test, as shown in FIG. 4, the top lid of the cap is opened, the whole is placed horizontally, and the side surface of the double extrusion tube container is sequentially pushed around the large bulging part to push the contents. Extruded.

<Evaluation result>
The surface of the extruded contents was covered only with ketchup and extruded with mayonnaise evenly contained inside.
It was also confirmed that it was extruded evenly until the end of extruding.

The multiple extrusion tube container of the present invention is as described above, and a viscous material containing a solid content can be used as the content as long as the solid content has a sufficiently small diameter.
In particular, even if the contents are different from each other, they are stored in different areas until they are poured, and after pouring in a multi-layered state at the outlet tip, the outer contents and the inner contents are combined, so that they are mixed. It is a tube container with high storage performance without deterioration due to.
Moreover, the merit of the present invention is that it can be uniformly dispensed in a multi-layered state until the end, and when combined with a hinge cap, the spout tip can be made into a spout with the tip of the spout fully extended from the top plate. big.

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Multiple extrusion tube container 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer tube 21 ・ ・ ・ ・ ・ ・ ・ ・ Body (outer tube)
22 ・ ・ ・ ・ ・ ・ ・ ・ Spout (outer tube)
221 ... Locking ring (outer tube)
23 ・ ・ ・ ・ ・ ・ ・ ・ Shoulder (outer tube)
3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner tube 31 ・ ・ ・ ・ ・ ・ ・ ・ Torso (inner tube)
32 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Spout (inner tube)
33 ・ ・ ・ ・ ・ ・ ・ ・ Shoulder (inner tube)
34 ・ ・ ・ ・ ・ ・ ・ ・ Positioning protrusion 341 ・ ・ ・ ・ ・ ・ ・ ・ ・ Hooking recess 4 ・ ・ ・ ・ ・ ・ ・ ・ Cap 41 ・ ・ ・ ・ ・ ・ ・ ・
411 ・ ・ ・ ・ ・ ・ ・ ・ ・ Hook protrusion (cap)
42 ・ ・ ・ ・ ・ ・ ・ ・ Top plate 421 ・ ・ ・ ・ ・ ・ ・ ・ ・ Peripheral step 422 ・ ・ ・ ・ ・ ・ ・ ・ Concave 43 ・ ・ ・ ・ ・ ・ ・ ・ Inner ring 44 ・ ・ ・ ・ ・Contact ring 45 ·································································································································································································································・ ・ ・ Inner ring 472 ・ ・ ・ ・ ・ ・ Locking ring 473 ・ ・ ・ ・ ・ ・ ・ Collar 474 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・54 ・ ・ ・ ・ ・ ・ ・ ・ 2nd positioning protrusion L1 ・ ・ ・ ・ ・ ・ ・ ・ Cylindrical shape Length (from the upper end of the positioning protrusion provided near the spout of the inner tube to the tip of the spout of the inner tube) Cylindrical shape length)
L2 ・ ・ ・ ・ ・ ・ ・ ・ Cylindrical shape length (Cylindrical shape length from the upper end of the contact between the spout of the cap and the spout of the inner tube to the tip of the spout of the cap)
r ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ The length of the radius of the spout in the inner tube (2r is the diameter)

Claims (4)

A large diameter outer tube consisting of a spout, shoulders and torso,
A small-diameter inner tube that is housed inside the outer tube and consists of a spout with a circular tip and a shoulder and body.
In a multi-extruded tube container consisting of a sealable cap that fits into the spout of the outer tube and has a spout with a circular tip.
It has at least two or more positioning protrusions on the outside from the spout of the inner tube to the shoulder.
The inner surface of the spout of the cap comes into contact with the positioning protrusion of the inner tube,
The spout of the inner tube and the spout of the cap have a uniform gap at the periphery .
A multi-extruded tube container characterized by having a hooking protrusion on the inner surface of the pouring outlet of the cap that hooks on the positioning protrusion of the inner tube to regulate the position in the pouring direction . The multiple extrusion tube container according to claim 1, wherein the spout tip of the cap is locked at the same position as the spout tip of the inner tube in the pouring direction. Positioning of the spout of the inner tube Cylindrical shape length from the upper end of the protrusion to the tip of the spout, and the tubular shape from the upper end of the contact between the spout of the cap and the spout of the inner tube to the tip of the spout of the cap The multiple extrusion tube container according to claim 1 or 2, wherein the length is equal to or larger than the length of the radius of the spout in the inner tube. The cross-sectional area of the gap between the spout of the outer tube and the spout of the inner tube is
The multiple extrusion tube container according to any one of claims 1 to 3, wherein a narrowed portion narrower than the gap cross-sectional area at the tip of the spout is provided below the tubular shape length.

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